#VU110251 Information disclosure in Go programming language - CVE-2025-4673

Vulnerability identifier: #VU110251

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-4673

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go programming language
Universal components / Libraries / Scripting languages

Vendor: Google

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to sensitive Proxy-Authorization and Proxy-Authenticate headers are not cleared on cross-origin redirect in net/http. A remote attacker can gain access to credentials passed via these headers.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.23.0, 1.23.1, 1.23.2, 1.23.3, 1.23.4, 1.23.5, 1.23.6, 1.23.7, 1.23.8, 1.23.9, 1.24 rc1, 1.24 rc2, 1.24 rc.3, 1.24.0, 1.24.1, 1.24.2, 1.24.3

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External links
https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A/m/XDxq7uidAgAJ
https://github.com/golang/go/issues/73816

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.